Fused switch



March 10, I925- 1,529,216

- J. sAcHs FUSED SWI TCH Filed Jan. 1925 2 Sheets-Sheet 1 a side view ofthe same.

Patented Mar. 10, 1925.

PATENT OFFICE.

JOSEPH SACHS, OI HARTFORD, CONNECTICUT.

FUSED SWITCH.

Application filed January 25, 1923. Serial No. 61,4,8Q7.

To all whom it may concern:

Be it known that I, J osnrrr SACHS, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented a new and useful Improvement in FusedSwitches, of which the following is a specification.

This invention relates to the class of knife blade switches on which aremounted en closed fuses. In this type of devices the switching elementcomprises two conducting blades mechanically joined but electricallyseparated by insulation, with a clip for recelving the terminal of anenclosed fuse electrically connected with each blade, one blade beingpivoted to a conducting clip secured to an insulating base and the otherblade being adapted to be swung into and out of engagement with anotherconducting clip fastened to the base.

The object of this invention is to provide a cheap but very ruggedconstruction which may be readily employed to receive the terminals ofthe common type of enclosed fuses and hold them close to the switchingblades, thus ensuring acompact structure which is particularlyserviceable when the switch is located in an enclosing box as it enablesthe height of the box to be reduced.

The conception is applicable to the construction of one, two or morepole switches but in the accompanying drawings only one switchingelement is illustrated. Fig. 1 is a top view of a switching elementconstructed according to this invention, provided with clips forreceiving the terminals of a knife blade type of enclosed fuse. Fig. 2is Fi 3 is a view of one end. Fig. 4 is a view the other end. Fig. 5 isa view of one of the fuse clip saddles. Fig. 6 is a top view of aswitching element provided with clips for receivin the terminals of aferrule type of enclose fuse. Fig. 7 is a side view of the same. Fig. 8is aview of one end. Fig. 9 is a view of the other end. Fi 10 is a viewof one of the saddles used fl ir mounting the ferrule fuse clips.

The base 11 of this switch is usually made of porcelain of a lengthdepending on the le h of the switching element and of a ing elements tobe mounted thereon. Securednear one end of the base is a conducting clip12 provided with circuit wire attachn wi th depending on the number ofswitching means 13 and secured near the other end of the base is aconducting clip 14 provided with circuit wire attaching means 15.

Held by the pivot 16 between the ears of the switch clip 12 is aconducting blade 17 and adapted to swing into and out of engagement withthe ears of the switch clip 14, when the switching element is turned onthe pivot, is a conducting blade 18. Slid upon the shank of each of theswitch blades is a saddle 19 of conducting material. The shanks of theblades are slightly reduced in width and the saddles have slots 20 thatfit the reduced sections of the blade shanks, which are, after thesaddles have been placed thereon, staked or slightly swaged up asillustrated at 21 in Figs. 2 and 7 for retaining the saddles firmly inposition and ensuring good electrical connection between the blades andsaddles. After the saddles have been secured on the blades the shanks ofthe blades are fastened by rivets 22 between two insulating plates 23which securely join but electrically insulate the bladesand saddles atthe opposite ends of the switching element. The upper ends of thesaddles are bent at right angles so as to have a section 24 extendingparallel with, and but a little distance above the blades.

In the form first illustrated the edges of the upper sections of thesaddles are turned down to form ears 25 as shown in Fig. 5 and fastenedto these cars by rivets 26 are the lower ends of the conducting springfingers 27 which form the clips that are designed to receive theterminals of a knife blade onclosed fuse. One or both of the saddles maybe extended and bent upward to form a lug 28 as shown in Fig. 2 forreceiving a terminal of a meter testing apparatus when desired. Fastenedto the rupture or swinging end of the switching element by rivets 29 isan insulating coupling piece 30 which has a slot 31 designed to receivethe cross bar 32 of the crank rod that is commonly emplo ed to 0 en andclose these switches when t ey are ocated in an enclosing case.

In the second form illustrated attached to the upper sections 24.- ofthe saddle by rivets 33 are clips 34 made from single pieces ofconducting metal bent to receive the terminals of enclosed fuses of theferrule contact 81 18 saddles are simple and cheap to manufacture andassemble on the blades and the fuse clips are easily attached to thesaddles. The insulating plates are very strongly fastened to the bladeswhich pass through the slots in the saddles. The strains on the meanswhich fasten the shanks of the blades to the insulating plates inopening and closing the element from the terminal clips, are sustainedto a great extent by the fact that the ends of the plates butt againstthe inner faces of the saddles which are strongly secured to the bladesand the strains of applying and removing a fuse from the fuse clips aretransmitted through the saddles directly to the blades. This forms avery rugged structure and ensures good switching connections and fuseconnections for an indefinite period. Furthermore when the fuses areapplied to the switching element they lie relatively close thereto sothat they will not take up much room when the switch is placed in anenclosing box.

The invention claimed is:

1. A fusible switch comprising a pair of conducting blades, a air ofinsulating plates mechanically joining and electrically insulating saidblades, saddles of conducting material having sections fitted upon andsecured to the blades adjacent to the ends of the insulating plates andoverlying sections bent outwardly therefrom and extending over theblades, and fuse receiving clips fastened to the overlying sections ofthe saddlesabove the blades.

2. A fusible switch comprising a pair of conducting blades, insulatingmaterial mechanically joining and electrically insulating said blades,saddles of conducting material having sections fitted upon and securedto the blades and overlying sections extending at an angle thereto, saidoverlying sections of the saddles having downwardly extending ears, andfuse clip fingers secured to said ears.

3. A fusible switch comprising a pair of conducting-blades, insulatingmaterial mechanically joining and electrically insulating said blades,saddles of conducting material having sections fitted upon and securedto the blades and overlying sections bent outwardly therefrom extendingover the blades, the outer end of one of the sad- -ing material havingslotted dles being extended upwardly to provide a testing lug, and fusereceiving clips fastielned to the overlying sections of the sad- 4. Afusible switch comprising a pair of conducting blades, insulatingmaterial mechanically joining and electrically insulating said blades,angular saddles of conductsections fitted upon and secured to the bladesand sections bent upwardly and overlying the blades, and fuse receivingclips fastened to the overlying sections of the saddles above theblades.

5. A fusible switch comprising a pair of insulating plates, conductingblades with their inner ends secured between said plates, saddles ofconducting material fitted upon and secured to the blades adjacent tothe ends of the insulating plates, said saddles having outwardly bentsections extending above the blades andfuse receiving clips fastenedupon the overlying sections of the saddles above the blades.

6. A fusible switch comprising a pair of conducting blades, insulatingmaterial joining but'electrically insulating said blades, angular saddleplates of conducting material having perforated vertical sections fittedto the blades and horizontal sections overlying the blades, and fusereceiving clips secured to said overlying sections of the saddles.

7 A fusible switch comprising a pair of conducting blades, insulatingmaterlal mechanically joining but electrically insulating said blades,angular saddle plates of conducting material secured to the blades, saidplates having vertical sections attached to the blades and horizontalsections extending parallel to and above the blades, and fuse receivingclips fastened upon the sections of the saddles that are parallel to theblades.

8. A fusible switch comprising a pair of conducting blades, insulatingmaterial mechanically joining but electrically insulating said blades,angular saddles of conducting material having legs fitted upon andsecuredto the blades and legs extending at right angles above theblades, and fuse recelving' c ips fastened to said upper legs of thesaddles.

JOSEPH SACHS.

